1 It took place shortly after 4 am on 8 December 1941, and left 61 dead and 133 people injured. Retrieved 29 August 2017.The first air raid on Singapore was carried out by 17 Japanese planes from the Imperial Japanese Navy Air Force, launched from Japanese-occupied Saigon (now known as Ho Chi Minh City) in Vietnam. Archived from the original on 29 August 2017. "J-alert to serve as early warning system during weather emergencies". 東京都防災 (Tokyo Disaster Prevention Information) (in Japanese). ^ Tsunami Warning in multiple languages.^ "Disaster agency urges municipalities to upgrade J-Alert receivers".Archived from the original (PDF) on 18 September 2017. ^ a b "Japan Launches Alert System For Tsunamis And Missiles".^ "J-Alert: disaster warning technology in Japan – Centre for Public Impact".Cost had been a major factor the initial installation is estimated to be around 430 million yen, and the yearly maintenance is estimated to be around 10 million yen.īy May 2013, 99.6% of municipalities nationwide were covered. However, by 2011, only 36% of the nation had been covered. Upon its introduction, the Japanese government hoped to have 80% of the country equipped with the J-Alert system by 2009. Many prefectures and urban areas were slow in adopting the system. ![]() Other information for civil and national defense.Information of guerrilla and special forces attacks.Warnings for heavy rain, heavy snow, gale, snowstorm, waves, and storm surge.Emergency warnings for heavy rain, heavy snow, gale, snowstorm, waves, and storm surge.Warning of volcanic eruption and the possibility of eruption.Emergency warning of volcanic eruption and the possibility of eruption.Earthquake prediction information of the Tōkai earthquakes.Earthquake prediction advisory information of the Tōkai earthquakes.Earthquake prediction warning for the Tōkai earthquakes.Information of hypocenter, magnitude, intensities of various areas, and the presence of tsunami.Quick updates on hypocenter, magnitude, and precautions of possible tsunami.Information transmission capabilities Īlert messages sent on 29 August 2017 North Korean missile launch over Japan When there is a civil emergency such as a ballistic missile heading towards Japan, a special air raid siren sounds across loudspeakers and on TV and radio. J-Alert broadcasts via both ground systems and the Superbird-B3 communication satellite. The severe weather warnings are only broadcast in Japanese. The warnings were broadcast in these languages during the 2011 Tōhoku earthquake and tsunami. Īll warnings, except for severe weather warnings, are broadcast in five languages: Japanese, English, Mandarin, Korean, and Portuguese (Japan has a small Chinese, Korean, and Brazilian population, as well as British, American, and other English-speaking populations). The new models can automatically process the information within two seconds, compared to the older models that can take up to twenty seconds. An enhanced version of the J-Alert receivers were installed by the end of March 2019. According to Japanese officials, it takes about one second to inform local officials, and between four and twenty seconds to relay the message to citizens. J-Alert is a satellite based system that allows authorities to quickly broadcast alerts to local media and to citizens directly via a system of nationwide loudspeakers, television, radio, email, and cell broadcasts. The system was developed in the hope that early warnings would speed up evacuation times and help coordinate emergency response. The system is designed to quickly inform the public of threats and emergencies such as earthquakes, severe weather, and other dangers. J-Alert ( Japanese: J-ALERT/Jアラート, romanized: J Arāto full name 全国瞬時警報システム, Zenkoku Shunji Keihō Shisutemu, 'National Early Warning System') is the early warning system used in Japan.
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